Non linear systems are much more difficult for obvious reasons. It's much harder to predict out put if it isn't a straight line. Now add in chaotic systems. Now add in multiple feed back mechanisms not fully understood and possibly interpreted wholly wrong. That gets you close to climate modeling.

As already noted, the problem with cd's graph is that the PPM is expressed in a way to make it look bigger than it really is as a percentage...parts per hundred.

That graph shows an increase of .00005% in atmospheric content of Co2 since 1750. While the actual concentration of the gas has risen from .000272% to .000338%. Very little.

It's not generally expressed in PPM. It's 0.10% not 0.0000382% It's off by a factor of ten thousand.

Theorizing is one thing, empirical facts are another. At this point, both sides are theorizing.

The Climate scientits circular logic is weird. "You can't prove us wrong so we must be right but you must prove us wrong even though we can't prove we're right."

Could you put some dimensional analysis on those percentages. PPM or PPB is the usual method of talking about presence of materials in water or the air. Even commercial products that measure CO 2 use PPM. All reporting of elements and molecules to the EPA for air and water is given in PPM or PPB. Lead, Arsenic, Sulfates, Cyanide are all measured in PPM or PPB. I use to do Lead for air back before unleaded gas was dictated. Our analysis went from measured PPM to below detectable numbers at PPB in just over a year. So put some mass or count dimensional analysis on your numbers you would rather us use.

__________________Even a superstitious man has certain inalienable rights. He has a right to harbor and indulge his imbecilities as long as he pleases. . . He has a right to argue for them as eloquently as he can, in season and out of season. He has a right to teach them to his children. But certainly he has no right to be protected against the free criticism of those who do not hold them. He has no right to demand that they be treated as sacred. He has no right to preach them without challenge." -H.L. Mencken